An aeronautics professor says videos clearly show a sonic boom. But the U.S. Air Force has denied that any plane went ...

The loud bang, heard at around 11.35am on Friday, was reported across southern Essex, Cambridgeshire, Suffolk, Kent and parts of London. Some residents described the sound as a “vacuum-style” bang, ...

When the experimental XB-1 aircraft achieved supersonic speeds on a test flight, it did not create a disruptive sonic boom – thanks to a physics phenomenon called the Mach cutoff ...